package com.java_Test;

import java.io.File;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Scanner;

import java.util.Set;

public class test {

    public static void main(String[] args) throws Exception {

        new test().wordCount();

    }//统计文本中单词出现的个数

    public void wordCount() throws Exception{

        File file=new File("text3.txt");

        Scanner sc=new Scanner(file);

        HashMap<String,Integer> hashMap=new HashMap<>();

        System.out.println("文章----------------------");

        while(sc.hasNextLine()){

            String line=sc.nextLine();

            System.out.print(line+" ");

            String[] lineWords=line.split("\\W+");

            Set<String> wordSet=hashMap.keySet();

            for(int i=0;i<lineWords.length;i++){

                if(wordSet.contains(lineWords[i])){

                    Integer number=hashMap.get(lineWords[i]);

                    number++;

                    hashMap.put(lineWords[i],number);

                }else{

                    hashMap.put(lineWords[i],1);

                }

            }

        }

        System.out.println("统计单词------------------");

        Iterator<String> iterator=hashMap.keySet().iterator();

        while(iterator.hasNext()){

            String word=iterator.next();

            System.out.printf("单词:%-12s   出现次数：%d\n",word,hashMap.get(word));

        }

    }

}